S&S CYCLE 128\" Power Package Engine Performance Kit — 4.5\" stroke, 4.25\" bore – 18-25 Softail, 19-25 Touring, 20-25 Trike, 22-23 CVO

🏍️ Enhance your M-Eight engine with a bolt-on big-bore performance kit from S&S Cycle that delivers robust power gains without case machining.

• S&S oil pump and cam plate with a blue-anodized finish for durable protection.
• Service-friendly design: removable passage plugs and an adjustable pressure relief valve that can be set with the unit installed.
• Independent scavenge sections and debris screens in both pickups, plus a cam-chest magnet to help keep contaminants out of the oil pump.
• Improved oil flow capacity on both feed and scavenge sides to support sustained high-load operation.
• Premium valvetrain components including quickee pushrods with chrome tubes, premium tappets, and hard-anodized billet tappet cuffs for greater stability at high lift and rpm.
• Cams and valve springs optimized for big-bore applications and higher-performance profiles.
• Includes all gaskets, bearings, and hardware for bolt-on installation; assembled and manufactured in the U.S.A. 🔧
• Not recommended for Tri-Glide or other three-wheel conversions due to the lugging characteristics of those platforms.